Function swapOrAddElement

swapOrAddElement<T>(array: T[], value: T, replacement: T): undefined | T
Replaces the first array element matching the given value with the given replacement, or else adds it to the end of the array.
Type Parameters
- T
Parameters
- array: T[]
- value: T
- replacement: T
Returns undefined | T
the original element if replaced, undefined if added
- Defined in src/array.ts:147